Click
the download link button for the Discoveri-y D-4 MT6572 NAND Firmware (flash file) from
google drive link. Downloaded file contains the firmware file, Read
report & Flashing instruction.>>>>>>>>>>> How to flash <<<<<<<<<<<- What is Flashing or upgrading firmware--
***Flash means Re-installing a different version of Operating System. A
Flashing make your mobile as a new & fresh condition. - Why does flashing a mobile phone:-- Flashing required when operating system gets corrupted of many software related problem.- your phone functioning is slow, restarting problem, Sometimes your phones application is not working- unfortunately Error your phone, sometimes your phone booting problem is occurred.- when Virus entered in your phone, when your phone is not on or open, when your phone,s operating is crashed.- Re-installing operating system usually make it faster,provide batter battery-life or add new features.- How to Flash Stock rom or firmware upgrade on a mobile phone:-## The requirements of phone is battery backup of 40% to 50%Step 1: Download and extract the stock firmware files on your computer.Step 2: Install the USB DRIVER on your pc (skip if drivers are already installed).Step 3: Open the SP FLASH TOOL and load the Scatter File from the firmware folder.Step 4: Click on firmware Upgrade / Download Button on SP Flash Tool to Begin the Flashing.Step 5: Connect your Smartphone to the computer using the USB Driver.Step 6: Pop up Green Ring will appear at the end of successful Flash.

>>>>>>>Video Tutorial for flashing<<<<<<<<

Caution:[*]
Take a Backup of your phone data before flashing, upgrading or
installing the firmware on your phone. This can help to recover your
data whenever anything wrong happens.